What is the probability of selecting 2 red marbles from a bag with 7 red and 3 green?
Say you reach a bag, toss balls around, and take one. You save the color of this marble, then replace it in the bag, and reach a 2nd time. What is the probability selecting 2 red marbles? And how is it found? I know that the total potential equal 21 (7 times 3 = 21 total possibilities =)
The probability is very low.
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